An emergency stop switch structure

Abstract

This utility model discloses an emergency stop switch structure, which includes: a housing, a cover plate, a pull rod, a locking nut, a limit switch, and a reset switch; the pull rod, limit switch, and reset switch are threadedly connected to the housing; the cover plate encloses the pull rod, limit switch, and reset switch within the housing; springs are provided between the pull rod and the inner wall of the housing, and between the reset switch and the inner wall of the housing, and the springs are in a compressed state. Furthermore, this utility model enhances the overall sealing performance of the emergency stop switch by adding rubber gaskets between the housing and the cover plate, and between the locking nuts; the gear design at the reset switch optimizes the reset method, reduces space, and the addition of a protective sleeve reduces the frequency of accidental activation, thus enhancing the overall safety performance of the emergency stop switch structure.

Description

Technical Field

[0001] This utility model relates to the field of emergency stop switches, and in particular to an emergency stop switch structure. Background Technology

[0002] Emergency stop switches are a type of master control electrical switch. When a machine is in a dangerous state, they cut off the power supply in an emergency to stop the equipment and protect the safety of personnel and equipment. Intrinsically safe emergency stop switches for mining are intrinsically safe electrical equipment suitable for underground coal mine work and have dustproof and waterproof properties.

[0003] The existing technology includes a Chinese patent with publication number CN211507420U. In the use of intrinsically safe emergency stop switches in mines, the equipment is stopped by pulling the lever. Pulling the reset ring on the reset lever compresses the spring on the reset lever, and the hydraulic oil in the spring mounting ring groove on the reset lever moves to the spring mounting ring groove on the actuating lever, thus completing the reset. Since the reset ring is mostly made of steel wire rope and polyester rope, relying on the reset ring to pull the lever can easily aggravate the wear and aging of the reset ring, causing breakage and accidental activation. After the reset ring breaks, it is difficult to pull it by the diameter of the reset lever alone, making it difficult to reset the emergency stop switch.

[0004] In summary, existing emergency stop switch structures mostly use pull rings to pull rods for emergency stop and reset, which can easily cause the pull rings to break. Relying solely on the rods makes it difficult to complete the reset and can easily lead to accidental activation. In addition, the defects in the sealing treatment of the housing cannot fully meet the safety production requirements in mines. Utility Model Content

[0005] To address the shortcomings of existing technologies, such as the difficulty in resetting emergency stop switches due to broken or missing pull rings, this invention provides an emergency stop switch structure that solves the problems of easy pull ring breakage leading to reset difficulties and accidental activation. This invention features a simple structure, ease of use, high safety, and strong sealing.

[0006] The technical solution adopted by this utility model to solve its technical problem is an emergency stop switch structure, including a housing and a cover plate. There is a wire tube on each side of the housing, which is symmetrically distributed. A pull rod, a limit switch and a reset switch are provided inside the housing.

[0007] The pull rod is equipped with a slider, a pull ring, and a compression spring; the slider is bolted to the middle of the pull rod, and compression springs are installed between the two sides of the slider and the inner wall of the housing; the pull rod passes through the housing and is fixed inside the housing by the compression springs and the slider.

[0008] The reset switch includes a locking shaft, a tower spring, gear teeth, a gear, and a protective sleeve. The locking shaft has a ring at its end inside the housing. The ring compresses the tower spring between the ring and the inner wall of the housing. The shaft end near one end of the ring is embedded in the first groove. The other end of the locking shaft has gear teeth.

[0009] The protective sleeve has a rotating shaft inside, and the gear is fixedly connected to the rotating shaft.

[0010] Preferably, the pull rod is provided with two locking nuts at each end, one of which is threaded to the housing, the two locking nuts are threaded together, and a rubber gasket is installed at the connection of the two locking nuts.

[0011] Preferably, the pull rod and the slider are connected by bolts, and the slider has two grooves, namely a C-shaped first groove and a trapezoidal second groove.

[0012] Preferably, the two ends of the pull rod are threaded with pull rings, and the pull rod is movably connected to the housing due to the force of the compression spring on the slider.

[0013] Preferably, the limit switch includes a mounting base plate, a limit switch base plate, a swing plate, a roller, a riveting shaft, and a contact. The limit switch base plate is fixedly installed on the mounting base plate. The swing plate is L-shaped, with its long side connected to the limit switch base plate and a roller connected to the riveting shaft on its short side.

[0014] Preferably, the locking shaft, gear teeth, and gear are fitted with protective sleeves; the protective sleeves have a first through hole and a second through hole, the first through hole for the locking shaft to move, and the second through hole for the gear to rotate.

[0015] Preferably, the housing and the cover are connected by screws and fitted with rubber gaskets.

[0016] Preferably, a rubber gasket is installed between the housing and the cover plate.

[0017] Preferably, the C-shaped first groove of the slider abuts against the locking shaft.

[0018] Preferably, when the lever is pulled, the slider compresses the compression spring along the direction of lever movement, and the roller rolls along the inclined surface of the trapezoidal second groove, causing the swing plate to press the contact to trigger the limit switch, and the locking shaft is springed into the C-shaped first groove by the tower spring.

[0019] This utility model provides an emergency stop switch structure that can solve the problem in the prior art where the intrinsically safe emergency stop switch for mining cannot be pulled to reset the switch when the pull ring breaks under special circumstances; the installation of the protective sleeve and manual reset eliminate the risk of accidental contact; the easily detachable slider reduces the cost of parts replacement; and the added rubber pad enhances the dustproof and waterproof capabilities of the emergency stop switch when working in harsh environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal cross-section of the present invention.

[0022] Figure 3 This is a schematic diagram of the limit switch.

[0023] Figure 4 This is a schematic diagram showing the connection of the limit switch, pull rod, and reset switch.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Cover plate; 2. Pull ring; 3. Pull rod; 4. Housing; 5. Rubber pad; 6. Locking nut; 7. Reset switch; 8. Limit switch; 9. Screw; 10. Slider; 11. Compression spring; 12. Mounting base plate; 13. Limit switch base plate; 14. Gear; 15. Gear tooth; 16. Protective sleeve; 17. Locking shaft; 18. Tower spring; 19. Swing plate; 20. Roller; 21. Riveting shaft; 22. Contact; 23. Conduit. Detailed Implementation

[0026] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0027] like Figures 1 to 4 As shown, an emergency stop switch structure provided in this embodiment of the present invention includes a cover plate 1 and a housing 4, and a rubber pad 5 and a screw 9 are also provided between the cover plate 1 and the housing 4;

[0028] In one specific embodiment, screws 9 are used to fix the rubber pad 5 between the cover plate 1 and the housing 4, so that the emergency stop switch is in a closed state, thereby increasing the dustproof and waterproof performance of the emergency stop switch structure.

[0029] Locking nuts 6 are provided on both sides of the housing 4, and the locking nuts 6 are threadedly connected to the housing 4. A rubber gasket 5 is also provided between the housing 4 and the locking nuts 6 to enhance the sealing performance.

[0030] The housing 4 and the locking nut 6 are penetrated by the pull rod 3. The two ends of the pull rod 3 are equipped with threaded pull rings 2. There is a wire tube 23 on each side of the housing 4.

[0031] A slider 10 is bolted to the middle of the pull rod 3 inside the housing 4, which facilitates installation, removal and replacement, and reduces the cost of parts replacement; two compression springs 11 are installed on the pull rod 3, which are located between the slider 10 and the inner wall of the housing 4 respectively; the slider 10 has two grooves, namely a C-shaped first groove and a trapezoidal second groove.

[0032] The slider 10 is provided with a limit switch 8 near the trapezoidal second groove. The limit switch 8 is fixed to the inner wall of the housing 4 by bolts. The limit switch 8 includes a mounting base plate 12, a limit switch base plate 13, a swing plate 19, a roller 20, a riveting shaft 21, and a contact 22. The limit switch base plate 13 is fixedly installed with the mounting base plate 12. The swing plate 19 is L-shaped, with its long side connected to the limit switch base plate 13 and its short side connected to the roller 20 by the riveting shaft 21. The roller 20 can roll normally.

[0033] The housing 4 is provided with a locking shaft 17 inside. The C-shaped first groove of the slider 10 abuts against the locking shaft 17. One end of the locking shaft 17 located inside the housing 4 is provided with a ring, and a compressed tower spring 18 is installed between the ring and the inner wall of the housing 4. The shaft end of the locking shaft 17 near the ring can be embedded into the trapezoidal second groove. The locking shaft 17 located outside the housing 4 has a section of gear teeth 15 on one side of its end.

[0034] The gear 14 is meshed with the gear 15;

[0035] A protective sleeve 16 is provided on the outside of the locking shaft 17, the gear teeth 15 and the gear 14, and a rotating shaft is provided inside the protective sleeve 16. The gear 14 is fixedly inserted into the rotating shaft.

[0036] The protective sleeve 16 has a first through hole for the locking shaft 17 to move, and a second through hole on the right side for the gear 14 to rotate. The tower spring 18, the locking shaft 17, the gear teeth 15, the gear 14 and the protective sleeve 16 together form the reset switch 7. The pull rod 3 is close to the reset switch 7, and the wire conduit 23 is away from the reset switch 7.

[0037] When the lever 3 is pulled, the slider 10 will press the compression spring 11 along the moving direction of the lever 3, and the roller 20 will roll along the inclined surface of the trapezoidal second groove, so that the swing plate 19 presses the contact 22 to trigger the limit switch 8, and the locking shaft 17 is pushed into the C-shaped first groove by the tower spring 18, thus completing the emergency stop.

[0038] When gear 14 is turned down, locking shaft 17 moves upward, compressing tower spring 18 and breaking contact with the first C-shaped groove. The compressed spring 11 of slider 10 springs back to its original position, roller 20 rolls into the second groove, and swing plate 19 breaks contact with contact 22, completing the reset.

[0039] Working Principle: The emergency stop switch operates in two stages: emergency stop triggering and manual reset. It achieves rapid power cut-off and safety locking through mechanical linkage. Emergency Stop Triggering Process: Pulling the lever 3 (via the pull ring 2) moves the slider 10 to one side, compressing the springs 11 on both sides. The trapezoidal groove of the slider 10 pushes the roller 20, forcing the L-shaped oscillating plate 19 to rotate, pressing the contact 22 and instantly cutting off the circuit. As the slider 10 moves, the locking shaft 17, under the elastic force of the tower spring 18, embeds into the C-shaped groove of the slider 10, physically locking the slider 10's position and preventing the springs 11 from rebounding. Manual Reset Process: Moving the gear 14 moves the teeth 15 of the locking shaft 17 upwards, disengaging from the first groove of the slider 10, while simultaneously compressing the tower spring 18. The springs 11 release their stored energy, pushing the slider 10 back to its original position. The roller 20 slides back to the bottom of the second trapezoidal groove, the oscillating plate 19 disengages from the contact 22, and the circuit is restored.

[0040] The above-disclosed embodiments are merely specific examples of this utility model. However, the embodiments of this utility model are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. An emergency stop switch structure, comprising a housing (4) and a cover plate (1), characterized in that, The housing (4) has a conduit (23) on each side, which are symmetrically distributed; the housing (4) is equipped with a pull rod (3), a limit switch (8) and a reset switch (7); The pull rod (3) is provided with a slider (10), a pull ring (2) and a compression spring (11); the slider (10) is bolted to the middle of the pull rod (3), and compression springs (11) are installed between the two sides of the slider (10) and the inner wall of the housing (4). The pull rod (3) passes through the housing (4) and is fixed in the housing (4) by the compression springs (11) and the slider (10); The reset switch (7) includes a locking shaft (17), a tower spring (18), gear teeth (15), a gear (14), and a protective sleeve (16). The locking shaft (17) has a ring at its end inside the housing (4). The ring compresses the tower spring (18) between the ring and the inner wall of the housing (4). The shaft end near one end of the ring is embedded in the first groove. The other end of the locking shaft (17) is provided with gear teeth (15). The protective sleeve (16) has a rotating shaft inside, and the gear (14) is fixedly connected to the rotating shaft.

2. The emergency stop switch structure as described in claim 1, characterized in that, The pull rod (3) has two locking nuts (6) at each end. One of the locking nuts (6) is threaded to the housing (4), and the two locking nuts (6) are threaded together. A rubber gasket (5) is installed at the connection of the two locking nuts (6).

3. The emergency stop switch structure as described in claim 1, characterized in that, The pull rod (3) and the slider (10) are connected by bolts. The slider (10) has two grooves, namely a C-shaped first groove and a trapezoidal second groove.

4. The emergency stop switch structure as described in claim 1, characterized in that, The pull rod (3) is threaded to the pull ring (2) at both ends. Due to the force of the compression spring (11) on the slider (10), the pull rod (3) is movably connected to the housing (4).

5. The emergency stop switch structure as described in claim 1, characterized in that, The limit switch (8) includes a mounting base plate (12), a limit switch base plate (13), a swing plate (19), a roller (20), a riveting shaft (21), and a contact (22). The limit switch base plate (13) is fixedly installed on the mounting base plate (12). The swing plate (19) is L-shaped, with its long side connected to the limit switch base plate (13) and a roller (20) connected to the riveting shaft (21) on its short side.

6. The emergency stop switch structure as described in claim 1, characterized in that, The locking shaft (17), gear teeth (15) and gear (14) are fitted with protective sleeves (16); the protective sleeves (16) have a first through hole and a second through hole, the first through hole is for the locking shaft (17) to move, and the second through hole is for the gear (14) to rotate.

7. The emergency stop switch structure as described in claim 1, characterized in that, The housing (4) and the cover plate (1) are connected by screws (9) and are fitted with rubber gaskets (5).

8. The emergency stop switch structure as described in claim 2, characterized in that, A rubber gasket (5) is installed between the housing (4) and the cover plate (1).

9. The emergency stop switch structure as described in claim 3, characterized in that, The C-shaped first groove of the slider (10) abuts against the locking shaft (17).

10. The emergency stop switch structure as described in claim 3, characterized in that, When the lever (3) is pulled, the slider (10) presses the compression spring (11) along the moving direction of the lever (3), and the roller (20) rolls along the inclined surface of the trapezoidal second groove, so that the swing plate (19) presses the contact (22) to trigger the limit switch (8), and the locking shaft (17) is springed into the C-shaped first groove by the tower spring (18).

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